THQ has released Destroy All Humans! Big Willy Unleashed to both the Wii and PSP systems. The Big Willy is the prequel to Destroy All Humans! Path of the Furon that's coming soon. Here is more info on the game:

"Control Crypto as he travels the world in the Funked Out 1970's, unleashing massive destruction on foot, in his UFO and, for the first time, in the Big Willy mech. Set within an original storyline that compliments that of the PS3 and Xbox 360 version, Destroy All Humans! Big Willy Unleashed will take players around the world, lampooning hallmarks of the funkiest decade?the '70's. Take on humans and other enemies with a devastating arsenal of weapons and mental abilities?or take to the sky in your UFO to unleash massive destruction from above. Freely demolish 4 invasion sites as you take on over 20 story missions and 15 sandbox missions through three modes of play?Crypto, UFO, and BIG WILLY Mech.

-High Fidelity Destruction ? Manipulate or destroy virtually anything in the world; on foot, in the air (UFO) or with your BIG WILLY, a giant Furon mech.

-Open World Game play ? Explore 5 open world game environments and play through a variety of story missions and side-missions, or destroy everything and anything in sight via open-world sandbox gameplay.